Means for increasing the height of suction of pumps.



,A. C. E. BATEAU.

' MEANS FOR INGREASINGKTHE HEIGHT OF SUGTION l0F PUMPS.

APPLICATION FILED AUG. 9, 1909. RENEWED J'UNE 1B, 1912. 1,038,201.

Patented Septuw, 1912.

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UG'USTE CAMILLE EDMON'D RATEAU, l' PARIS, FRANCE.

nanars :non incnnnsrna fr HEIGHT or' sucrron or ru noaaeor,

, nieuwe s me naar' i retenues sont. io, rois.

v .application @led August 9,1909, Serial No. 511,874. Renewed June 113, 1912. Serial No. 704,469.

To cliente/m it may concern: Y

Be it known that l, AUGUSTE Cantina Eamonn Rameau, citizen lof France, residing fat @aria France, have invented a lcert-ain vpumps, the liquid in consequence of v Agreat velo/city in the intake has diiiculty inA :tollowin the vanos, and in order that separation o` the streams of fluid should no-tbe produced, it is necessary that a certain absolute pressure should be maintained 'at the intake. This pressure should be the greater when the speed of rotation of the. vanes is greater. From-this there results 'a certain inadaptahility of'high speed centrifugal puin s to give a height of suction in the neig borhood of that which corresponds to atmospheric pressure. l

lilithl the view of'augmenting the height of suction of pumps my invention consistsl in shunting ofi a portion of the liuid before its entrance in the intake o f the main pump and discharging it, under a given pressure, in a jet apparatus arranged in the suction pipe in such a manner as to produce an entraininent of the iduid which is sucked in, and thus increasing the pressure of the fluid `at the point of injection.

rlhe accompanying drawing represents, by Wayv of example, one form of arrangement ior the realization of the invention.

Before the intake c of a centrifugal wheel h or of the usual group of such wheels, -is placed a helicoidal wheel c of which the dis'- charge passage or 'pipe al ends in an injectorl e, which is placed at a given point on the suction pipe fg. Said suctionpipe is 'pro` vided as usual with a foot valve .71.. This rangement operates inthe vfollowinigl manner.

AThe pipe g and the pump Zware led with" water an the helicoidal wheel c is putin operation. The valve k' then'opens, even Iif the height of the suction columnis eater than ten meters. l'lhe helicoidal'y fw' eel fc taires a portion of the liquid beforeits en trance to thefintake of the pump b and discharges it in the shunt-,pipe d. This portion of the liquid which is shunted oif passes 'to the annular space. of the injector'e, while wit injector arran ed therein, a's unt pipe exthe liquid coming of the suction pipe passes to the interior of the nozzle of the injector. The liquid coming from the pipe ci tends to induce the lentraimnent of the liquid coming from the pipe g, so that the pressure of the liquid sucked -up is raised inthe part f of the suction pipe at the discharge of the injector.

llff, fo1 example, the pipe d has a section equal'to that of the pipe g and in conse- 'om the lower part g quence the section of the pipe f is twice such section, in giving to the liquid in d a pressure H, experience shows that the injector will raise the pressure of the liquid sucked up by about l; I-l. In the case of Water in particular, if the total height of the column fg is 10 meters, the result is as if this height was reduced to 3.01% and the pumping apA parat-us can Athus operate on`sjuctions which even exceed 'l0 meters. 4

' In place of'having the motive liquid dischar ed in the annular space of the injector e an the entrained liquid in the nozzle, it is evident. that the arrangement could be reversed without changing the mode of operation of the apparatus.

In practice, the-pump hand the helicoidal wheel c are mounted with advantage on the same shaft in sucha' manner as to be driven by the same motor.

, Any kind of a wheel, centrifugal, helicocentrifu al or a group of these Wheels, can be substitutedsfor the helicoidal wheel 0 vas is evident. The process is equally applicable' if the centrifugal pump l5 be v:replaced l by a pump of any nat-ure. The invention nds special` application in the pumping out of mines and in all installations or works in which itis often necessary to suck liquids at a great depth.A I claim:

1. In an ha paratus for increasing the heiglht of suction of pumps, the combination wittion `lpipe-to said ingector, and means for forcing a portion o the fluid, before its a pump, of a suction pi e having aninjector arran ed therein, a s untp1peveX-` V.tending from t eupper portion of said sucentrance to said pump, under pressurethrough said shunt pipe.

2. In an 'a paratus for increasing the .i

hei ht of suction of pumps, the combination h apump, of a suction pi e having an tion pipev to said injector, and a Wheel for' dischargmg a portion of the fluid, before its entrance to said pump,I under pressure through said shunt pipe.

3. In an apparatus for increasing the height of suction of pumps, the combination with av pump, of a suction pipe having an injector arranged therein, a shunt pipe extendl mg from the upper portion of said pipe to ,sald in'ector, and a helicoidal4 Wheel arranged 1n said shunt pipe for discharging a portion of the fluid under pressure into said shunt pipe.

4. In an apparatus for' increasing the 15 height of suction of pumps, the combination with a pump, of a suction pipe having an injector arranged therein, a shunt plpe extending from the upper portion of said suction plpe to said injector, a wheel for discharging a portion of the fluid, before, its

entrance to said pump, under pressure through said shunt pipe, and a shaft upon -'which both said pump and said Wheel are 

